A fluorescence quenching study of the interaction of Suwannee River fulvic acid with iron oxide nanoparticles

Manciulea, Adriana; Baker, Andy; Lead, Jamie R.

doi:10.1016/j.chemosphere.2009.04.067

Cited by 62 publications

(47 citation statements)

References 45 publications

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“…This can be used to estimate the number of bound ligand molecules or functional groups (Plancque et al, 2003;Rabung et al, 2006;Marmodée et al, 2009). For HSs and natural mineral surfaces, both of which are known to contain small amounts of transition metals like Fe 3+ as impurities, non-radiative transition to impurities could act as additional energy dissipation pathways and complicate the interpretation of observed lifetimes (Rabung et al, 2005;Manciulea et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Speciation of Eu3+ bound to humic substances by time-resolved laser fluorescence spectroscopy (TRLFS) and parallel factor analysis (PARAFAC)

Lukman

Saito

Aoyagi

et al. 2012

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

Speciation of Eu3+ bound to humic substances by time-resolved laser fluorescence spectroscopy (TRLFS) and parallel factor analysis (PARAFAC)

Lukman

Saito

Aoyagi

et al. 2012

Geochimica et Cosmochimica Acta

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“…Since Ryan and Weber (1982) fluorescent dissolved organic matter (FDOM) was studied by using fluorescence quenching. As this method is easy to use, lots of measurements were done on FDOM from several types of samples: seawater (Esteves da , river (Mounier et al 1999), complex mixture (Smith and Kramer 1998) or extracted organic matter (Cabaniss 1992;Esteves da Silva et al 1998;Smith and Kramer 1999;Dudal et al 2006;Manciulea et al 2009). Even if it is common in use, the fluorescence quenching suffers serious drawbacks: (1) It exclusively concerns the fluorescent functions, and the result of a quenching experiment is only a part of the DOM response (Smith and Kramer 2000), (2) The choice of the observation wavelength is determinant.…”

Section: Introductionmentioning

confidence: 99%

Copper complexing properties of dissolved organic matter: PARAFAC treatment of fluorescence quenching

et al. 2010

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Fluorescence quenching of the fluorescence is a useful method to determine copper complexing properties of the dissolved organic matter. This technique provides express results often by choosing one or two excitation-emission fluorescence measurement for a straight range of concentration. That why it is not representative of the whole sample. On another hand, using total luminescence spectra gives lots of information that is difficult to manipulate in term of complexing properties. This work focus on a fluorescence quenching experiment carried out on a filtered black water from Rio Negro from north Brazil (Sao Gabriel da Cachoeira) using excitation emission matrix of fluorescence (EEMF) with a large range of copper concentration. Indeed, metal additions were performed using logarithmic increments of the total copper concentration to cover a wide range of concentration from 1.7 9 10 -9 to 10 -3 mol l -1 . These data were treated by two different ways for comparison: on the one hand, data treatment were computed, as usually, at different fluorescence intensity positions using multi-response wavelength method with two ligand, and, on the another hand, a statistical method, parallel factor analysis (PARAFAC), was applied to extract fluorescent component. Then a fitting was done on these PARAFAC components with one or two complexing sites each one. Results show that PARAFAC enables quantitative evaluation of complexing parameters for copper as good as certain multi-response methods: L 1T 16.2 9 10 -6 mol l -1 (5.0 \ log(K 1 ) \ 5.8) and L 2T 3.0 9 10 -4 mol l -1 (2.8 \ log(K 2 ) \ 3.9). PARAFAC confirms that for this natural sample only two fluorescent ligands are present with two types of site for each component. No residual fluorescence was detected by the statistical treatment. Wall surface interferences were pointed-out as phenomenon to be solve to overcome the limiting efficiency of the total copper concentration range.

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“…Optical properties were not determined for the Fe amended sample because Fe has a quenching effect on absorbance and fluorescence (Cabaniss, 1992;Pullin et al, 2007;Manciulea et al, 2009) and causes wavelength shifts in FT-IR absorbances (Abdulla et al, 2010). Our Fe speciation results indicate that Fe was initially present mainly as organically complexed Fe(III) in the aqueous phase ( Figure 9A; Rue and Bruland, 1995;Powell and Wilson-Finelli, 2003).…”

Section: Fe Speciation In Fe Amended Wood Leachatementioning

confidence: 93%

Studies on Hydroxyl Radical Formation and Correlated Photoflocculation Process Using Degraded Wood Leachate as a CDOM Source

Sun

Mopper

2016

Front. Mar. Sci.

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In this study, we examined hydroxyl radical ( OH) formation with respect to photoreactivity of colored dissolved organic matter (CDOM), the Fenton reaction, and photoflocculation using leachate from decaying wood. The relationship between OH photoproduction rate and leachate optical properties (UV-visible absorption and fluorescence excitationemission matrices (EEMS)) was studied during irradiation using a UV solar simulator. The results showed that the OH photochemical formation rate is strongly related to humic-like fluorescence as characterized by parallel factor analysis (PARAFAC), and that these fluorescence components are more photolabile than most of the other CDOM components. Fourier transform infrared spectroscopy (FT-IR) indicated the photodegradation of lignin-related structures. To examine the role of iron and OH in the photoflocculation process, Fe speciation (particulate Fe, organically-complexed Fe(II), organically-complexed Fe(III), free Fe(II), and free Fe(III)) were measured in the leachate samples amended with Fe. The addition of Fe accelerated OH production substantially, and Fe was photochemically cycled between Fe(II) and Fe(III). The photodegradation of iron complexing ligands appears to play an important role in DOM photoflocculation.

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A fluorescence quenching study of the interaction of Suwannee River fulvic acid with iron oxide nanoparticles

Cited by 62 publications

References 45 publications

Speciation of Eu3+ bound to humic substances by time-resolved laser fluorescence spectroscopy (TRLFS) and parallel factor analysis (PARAFAC)

Speciation of Eu3+ bound to humic substances by time-resolved laser fluorescence spectroscopy (TRLFS) and parallel factor analysis (PARAFAC)

Copper complexing properties of dissolved organic matter: PARAFAC treatment of fluorescence quenching

Studies on Hydroxyl Radical Formation and Correlated Photoflocculation Process Using Degraded Wood Leachate as a CDOM Source

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